Figure 4. A model for RARα limited chromatin binding of RARα-RXRα heterodimers. (A) Pool of RXRα (red) and RXR partners (RARα – blue, other T2NRs-yellow) along with some number of chromatin bound RARα-RXRα heterodimers exist under normal conditions. (B) When the pool of free RXRα is increased, the number of chromatin bound RARα-RXRα heterodimers does not change. (C) When the pool of RARα is increased, chromatin binding RARα-RXRα heterodimers increases, until it reaches saturation. Note: For simplicity we have omitted to show heterodimerization of other T2NRs (yellow) with RXRα (red).

Limiting factors
For nuclear receptors
Live cell imaging

#ChromatinHaiku #SingleMoleculeTracking #ProximityAssistedPhotoactivation
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